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Blockchain Developer

Blockchain Developer

TopCrop

0 years

0 Lacs

bhubaneswar odisha india

Posted:4 days ago| Platform:

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Skills Required

blockchain developer export traceability contracts integration design qc mapping verification api rest graphql testing support pipeline solidity rpc postgresql optimization security audit react development collaboration

Work Mode

Remote

Job Type

Contractual

Job Description

Location:

Engagement:

Company:

About the Role

Polygon-based traceability platform

What You’ll Own

Smart Contract Development

Design & implement lifecycle contracts for batches, QC records, and shipment events on
Polygon
testnet/mainnet.
Create on-chain mapping for QR codes, IPFS hashes, and verification endpoints.
Optimize gas + security.

Blockchain & IPFS Integrations

Implement IPFS pinning for QC documents and metadata (Pinata / n8n).
Product Requirements Document
Integrate smart contracts with backend APIs (Hasura/PostgREST).

Backend & API Hooks

Build webhook triggers for batch.created, qc.completed, and shipment.status_changed events.
Work with REST/GraphQL API design and business logic.

Testing & Deployment

Write automated tests (Hardhat).
Deploy contracts using Infura/Alchemy.
Support CI/CD and QA pipeline setup.

Qualifications

Strong Solidity experience — deployed real contracts on testnet/mainnet.
Hands-on with
Polygon
, Hardhat, IPFS, RPC endpoints.
Experience integrating blockchain with
PostgreSQL, Hasura, REST/GraphQL APIs
.
Clear understanding of gas optimization, security patterns, audit basics.
Ability to work independently on fast timelines.

Nice to Have

Experience with n8n, Retool, React Admin.
Previous work on supply-chain or traceability systems.
Familiarity with QR-based verification flows.

Timeline

project-based contract

What We Offer

Competitive project fee (milestone-based).
Chance to build a real impact product used by global export buyers.
Opportunity for long-term collaboration after MVP.

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